<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button>按钮一</button>
    <button>按钮二</button>
    <script>
        var btns = document.querySelectorAll("button");
        btns[0].onclick = debounce(function(){
            console.log("点击了一");
        },2000);
        btns[1].onclick = debounce(function(){
            console.log("点击了二");
        },1000);
        function debounce(fn,delay){
            var timer = null;
            return function(){
                if(!timer){
                    fn();
                }
                clearTimeout(timer);
               timer = setTimeout(function(){
                    timer = null;
                },delay);
            }
        }
    </script>
</body>
</html>